title: Aneurysmal bone cyst at C2: imaging evaluation after intralesional injection of calcitonin and methylprednisolone.
abstract: OBJECTIVE
  To demonstrate imaging findings during the follow-up of patients with aneurysmal bone cyst (ABC) of C2 treated with intralesional injection of calcitonin and methylprednisolone.
  
  
  METHODS
  Three patients with ABC of C2 were treated percutaneously with intralesional injection of calcitonin and methylprednisolone. All the patients were females, with ages varying from 6 to 13 years. All of them presented with cervical masses, but without neurological symptoms.
  
  
  RESULTS
  Imaging follow-up with CT and plain films showed progressive ossification and reduction of the blood-filled cavities with volume reduction of all lesions. No recurrence was noted during the follow-up.
  
  
  CONCLUSIONS
  Intralesional injection of calcitonin and methylprednisolone is a safe treatment option for cervical ABC. The CT scan is especially valuable as a guide of injection site and for the follow-up of ossification of the treated ABCs.
authors.affiliation: Instituto Nacional de Traumato-Ortopedia, Rio de Janeiro, RJ, Brasil. etonomura@gmail.com
authors.forename: Elise T
authors.initials: ET
authors.lastname: Tonomura
authors.forename: Paulo
authors.initials: P
authors.lastname: Ramos
authors.forename: Paulo Miguel
authors.initials: PM
authors.lastname: Hemais
authors.forename: Edson
authors.initials: E
authors.lastname: Marchiori
authors.forename: Emerson L
authors.initials: EL
authors.lastname: Gasparetto
mesh_terms: D000293:Adolescent; D000893:Anti-Inflammatory Agents / Q000008:administration & dosage*; D017824:Bone Cysts, Aneurysmal / Q000000981:diagnostic imaging / Q000188:drug therapy*; D050071:Bone Density Conservation Agents / Q000008:administration & dosage*; D002116:Calcitonin / Q000008:administration & dosage*; D002574:Cervical Vertebrae / Q000000981:diagnostic imaging; D002648:Child; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D015552:Injections, Intralesional; D008775:Methylprednisolone / Q000008:administration & dosage*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
chemical_list: D000893:Anti-Inflammatory Agents; D050071:Bone Density Conservation Agents; D002116:Calcitonin; D008775:Methylprednisolone